Is the target of PU=170 in Run 5 OK for the detectors? (this is to ensure the 3000fb-1 goal)
If yes, would detectors prefer to have a gradual PU ramp-up already in Run 4 up to 170?
Concerning commissioning, what is the request of the detectors concerning PU ramp-up in the first year(s) of Run 4? (Wished steps in PU with integrated fb-1)
Do 8b4e or hybrid schemes pose limitations for the detectors in the HL era?
Baseline crossing scheme is H-V in IP1-5, respectively, and HL-LHC is compatible with V-H, initially conceived for energy deposition mitigations. Currently we are considering as an option V-H for improved performance with flat optics. What is the feedback or preference from the detectors?
Emittance and bunch intensity of witness bunches are respectively a factor 2 larger and a factor 2 lower than nominal bunches. Is this OK for background? Is there any more margin?